Houses with independent terraces or wide open balconies have ample space for 5–10kWh floor-standing energy storage units. The integrated unit requires no wall load-bearing installation with easy setup. Its large capacity fully stores daily terrace PV output to power multiple household appliances entirely by solar energy. The white casing features premium heat dissipation and high protection grade suitable for semi-outdoor balcony corners. It adapts automatically to PV and grid dual charging, switching to grid power on cloudy low-generation days. It supports full-house power supply and EV slow charging, plus blackout backup, delivering outstanding cost performance for terrace PV systems in villas and self-built homes.